﻿/**
 * Copyright (C) 2013 original author and authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NGuice.Inject.Spi;
using NGuice.Inject.Internal.Util;

namespace NGuice.Inject.Internal
{
    //complete!
    /// <summary>
    /// 处理Binder.BindScope命令
    /// </summary>
    internal sealed class ScopeBindingProcessor : AbstractProcessor
    {
        internal ScopeBindingProcessor(Errors errors)
            : base(errors)
        {
        }

        public override bool Visit(ScopeBinding command)
        {
            IScope scope = command.Scope;
            Type annotationType = command.AnnotationType;

            if (!Attributes.IsScopeAnnotation(annotationType))
            {
                errors.WithSource(annotationType).MissingScopeAnnotation();
                // Go ahead and bind anyway so we don't get collateral errors.
            }

            //if (!Attributes.IsRetainedAtRuntime(annotationType))
            //{
            //  errors.withSource(annotationType)
            //      .missingRuntimeRetention(command.getSource());
            //  // Go ahead and bind anyway so we don't get collateral errors.
            //}

            IScope existing = injector.state.GetScope(Preconditions.CheckNotNull(annotationType, "annotation type"));
            if (existing != null)
            {
                errors.DuplicateScopes(existing, annotationType, scope);
            }
            else
            {
                injector.state.PutAnnotation(annotationType, Preconditions.CheckNotNull(scope, "scope"));
            }

            return true;
        }
    }
}
